155005432265420 has 24 divisors (see below), whose sum is σ = 355103353917648. Its totient is φ = 56365611732800.

The previous prime is 155005432265353. The next prime is 155005432265423. The reversal of 155005432265420 is 24562234500551.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is not an unprimeable number, because it can be changed into a prime (155005432265423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 352285073111 + ... + 352285073550.

It is an arithmetic number, because the mean of its divisors is an integer number (14795973079902).

Almost surely, 2^{155005432265420} is an apocalyptic number.

155005432265420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155005432265420 is an abundant number, since it is smaller than the sum of its proper divisors (200097921652228).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155005432265420 is a wasteful number, since it uses less digits than its factorization.

155005432265420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 704570146681 (or 704570146679 counting only the distinct ones).

The product of its (nonzero) digits is 1440000, while the sum is 44.

Adding to 155005432265420 its reverse (24562234500551), we get a palindrome (179567666765971).

The spelling of 155005432265420 in words is "one hundred fifty-five trillion, five billion, four hundred thirty-two million, two hundred sixty-five thousand, four hundred twenty".